What's the plural form of Shumard oak? Here's the word you're looking for.
Answer
The noun Shumard oak can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be Shumard oak.
However, in more specific contexts, the plural form can also be Shumard oaks e.g. in reference to various types of Shumard oaks
or a collection of Shumard oaks.